Part No. 139378
Z-30/20N • Z-30/20N RJ • Z-34/22 • Z-34/22N
4 - 29
June 2011
Section 4 • Repair Procedures
REV A
10 Remove the hydraulic tank mounting fasteners.
Remove the hydraulic tank from the machine.
11 Open the ground controls side turntable cover.
12 Remove the terminal strip cover retaining
fasteners. Remove the cover.
13 Remove the terminal strip retaining fasteners.
Do not disconnect the wiring.
14 Remove the plastic plug in the bulkhead to
access the secondary boom lift cylinder rod-end
pivot pin.
15 Remove the mounting fasteners from the
function manifold and slide the manifold to the
side This will allow access to the hydraulic tank
side barrel-end pivot pin.
16 Attach a lifting strap from an overhead crane to
the lug on the rod end of the secondary boom
lift cylinder.
17 From the bottom side of the cylinder, remove
the retaining fasteners from the secondary
boom lift cylinder barrel-end pivot pins.
18 Remove the hose clamp under the lower
secondary boom.
19 Use a slide hammer to remove both barrel-end
pivot pins (access the pins from the access
holes in the bulkheads, one on each side).
20 Remove the pin retaining fastener from the
secondary boom lift cylinder rod-end pivot pin.
SECONDARY BOOM COMPONENTS
21 Use a soft metal drift to remove the secondary
boom rod-end pivot pin.
Crushing hazard. The secondary
boom lift cylinder may fall when
the rod-end pivot pin is removed if
not properly supported by the
overhead crane.
22 Carefully lower the cylinder down through the
secondary boom, enough to access the
hydraulic hoses. Do not pinch the hoses.
Component damage hazard.
Hoses can be damaged if they are
kinked or pinched.
23 Tag, disconnect and plug the hydraulic hoses
from the secondary boom lift cylinder. Cap the
fittings on the cylinder.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to squirt
or spray.
24 Remove the cylinder through the top of the
secondary boom.
Crushing hazard. The secondary
boom lift cylinder could become
unbalanced and fall when
removed from the machine if not
properly supported by the
overhead crane.
Summary of Contents for Z-30/20N
Page 1: ......
Page 148: ...6 46 June2011 Section 6 Schematics 6 45 Power Cable Wiring Diagram...
Page 149: ...6 47 Section 6 Schematics June2011 6 48 Drive Contactor Panel Wiring Diagram...
Page 152: ...6 50 June2011 Section 6 Schematics Manifold and Limit Switch Wiring Diagram 6 49...
Page 153: ...6 51 Section 6 Schematics June2011 6 52 LVI BCI Option Wiring Diagram...
Page 156: ...6 54 June2011 Section 6 Schematics 6 53 Charger Interlock Option...
Page 157: ...6 55 Section 6 Schematics June2011 6 56 CTE Option CE Models...
Page 160: ...6 58 June2011 Section 6 Schematics Hydraulic Schematic 6 57...
